Could be any..... Mine: If the saddles are high for my action (break angle) I will either have my luthier friend route the pocket down or I shim the hdstock end. That's to loosen for bending, and tweak the tone to my liking. (Seymour Duncan--I later found out, will 'route down' the pocket to keep the saddles low for his action so the rear pup is close into the ferrous bridge plate---for that tone mojo). --I also drill top-load for strings 1-4 on Tele vintage bridges---again a 'feel'--bending thang. --I will wind the D string towards the top of the post (Ahhh...bending!!) --of course, pup swaps, etc are parcel at times too!! --Stuck w D'Addario for yrs---recently tried others, and found EB to my liking on the wound strings. (9-42, 15 gauge G).